libmvfs/arglist.c

   1 /*
   2     libmvfs - metux Virtual Filesystem Library
   3
   4     Argument list handling
   5
   6     Copyright (C) 2008 Enrico Weigelt, metux IT service <weigelt@metux.de>
   7     This code is published under the terms of the GNU Public License 2.0
   8 */
   9
  10 #include "mvfs-internal.h"
  11
  12 #include <string.h>
  13 #include <malloc.h>
  14 #include <hash.h>
  15 #include <stdio.h>
  16 #include <errno.h>
  17
  18 #include <mvfs/mvfs.h>
  19 #include <mvfs/url.h>
  20 #include <mvfs/_utils.h>
  21
  22 struct __mvfs_args
  23 {
  24     hash hashtable;
  25 };
  26
  27 // not very efficient yet, but should work for now
  28
  29 MVFS_ARGS* mvfs_args_alloc()
  30 {
  31     MVFS_ARGS* args = calloc(1,sizeof(MVFS_ARGS));
  32     if (!hash_initialise(&(args->hashtable), 997U, hash_hash_string, hash_compare_string, hash_copy_string, free, free))
  33     {
  34         ERRMSG("hash init failed");
  35         free(args);
  36         return NULL;
  37     }
  38
  39     return args;
  40 }
  41
  42 const char* mvfs_args_get(MVFS_ARGS* args, const char* name)
  43 {
  44     if (args==NULL)
  45         return NULL;
  46
  47     const char* str = NULL;
  48     if (hash_retrieve(&(args->hashtable), (char*)name, (void**)&str))
  49         return str;
  50
  51     return NULL;
  52 }
  53
  54 int mvfs_args_set(MVFS_ARGS* args, const char* name, const char* value)
  55 {
  56     if (args == NULL)
  57         return -1;
  58
  59     hash_delete(&(args->hashtable), (char*)name);
  60     if (value==NULL)
  61         return 0;
  62
  63     if (!hash_insert(&(args->hashtable), strdup(name), strdup(value)))
  64         ERRMSG("failed for key %s", name);
  65
  66     return 1;
  67 }
  68
  69 int mvfs_args_setn(MVFS_ARGS* args, const char* name, const char* value, int sz)
  70 {
  71     if (args == NULL)
  72         return -1;
  73
  74     hash_delete(&(args->hashtable), (char*)name);
  75     if (value==NULL)
  76         return 0;
  77
  78     if (!hash_insert(&(args->hashtable), strdup(name), strndup(value,sz)))
  79         ERRMSG("failed for key %s", name);
  80
  81     return 1;
  82 }
  83
  84 int mvfs_args_free(MVFS_ARGS* args)
  85 {
  86     if (args==NULL)
  87         return -EFAULT;
  88
  89     hash_deinitialise(&(args->hashtable));
  90     return 0;
  91 }
  92
  93 MVFS_ARGS* mvfs_args_from_url(const char* url)
  94 {
  95     if (url==NULL)
  96         return NULL;
  97
  98     MVFS_URL* u = mvfs_url_parse(url);
  99     MVFS_ARGS* args = mvfs_args_alloc();
 100
 101     mvfs_args_set(args,"url",      url);
 102     mvfs_args_set(args,"path",     u->pathname);
 103     mvfs_args_set(args,"host",     u->hostname);
 104     mvfs_args_set(args,"port",     u->port);
 105     mvfs_args_set(args,"username", u->username);
 106     mvfs_args_set(args,"secret",   u->secret);
 107
 108     if ((!(u->type)) || (!(u->type[0])))
 109         mvfs_args_set(args,"type", "local");
 110     else
 111         mvfs_args_set(args,"type", u->type);
 112
 113     return args;
 114 }